Question

if one angle of a triangle is 80 degree and the other two angles are in the ratio 3 : 7

Answer 1

the sum of all angles of triangle is 180°.

so, 3x+7x+80=180
10x+80=180
10x=180-80
x= 100/10=10

so, first angle is 80°
second is 3×10=30°
third is 7×10=70°

80+70+30= 180

Answer 2

Answer:

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